– MLSP – National Labour Inspection, http://www.gli.government.bg/page.php?c=56;
– Confederation of Labor “PODKREPA”, Sofia 1000, 2 Angel Kanchev str., http://podkrepa.org
– MLSP – National Labour Inspection, http://www.gli.government.bg/page.php?c=56;
– Confederation of Labor “PODKREPA”, Sofia 1000, 2 Angel Kanchev str., http://podkrepa.org